Hole rolling tool



Dec. 22, 1931. (5. R. MAUPIN 1,837,624

HOLE ROLLING TOOL Filed March 23, 1951 F'IG.1

GRAVEJ Kl. MAUPIN BY? W' A fro/"r7915 Patented Dec. 22, 1931 UNITED STATES) GRAVES R. MAUPIN, or MoBEaLY, MISSOURI, Infestat on TO THE 1T. FAEssLERM G.

PATE'T 5 COMPANY, A PARTNERSHIP oonsrsrrne or cnm'sminra' 'r nssLEanmzABErH rAEssLnn, LOUIS n. FAESSLER, AND enavss R. MAUPIN, or MOBERLY,' ivrrssormr V HOLE ROLLING r001.

' Application filed March 23, 1931. SerialNo. 524,480.

The invention relates to a hole rolling tool, and has among its objects the production of such a device which will be simple in construction, easy of operations, sturdy, and satisfactory, andeflicient for use wherever found applicable. 7 V v When using a tool for rolling the peripheral wall surface of tapered openings, there Another object'of myinvention is to provide a rolling tool of the kind'describ-ed, the same having a collapsible collar carried thereby and insertable through the hole to be rolled, and in which the lateral'movement' of the rollers themselves will: act'uatesaid col.-

' lar to outermost position to form a limit stop for the tool and thus prevent the same from backing out of the opening. I

' Another object of my invention is to' provide an expansible collar carried, by such a tool, and in which means are provided for automatically collapsing said collar so that the tool may be easily withdrawn from the opening after the rolling operation is finished. i-

Many other objects and advantages of' the construction herein shown and described will be obvious to those skilled in the art to which this invention appertains from the disclosures herein. given.

To this end,'my invention consists in the novelvcons truction, arrangement and combination of parts herein shown and described and more particularly pointed out in the claims. I l l V I In the drawings, wherein like reference characters indicate like or corresponding plan view of through, with thetool'insert'ed throughthe hole to be rolled; and p I j Figure 3 is a section taken substantially along the line 3-3of Figure 2.: I k I.

Referring more particularly to the drawings, wherein I'hav-e illustrated a preferred embodinientofmy inventi'on,"A indicates any suitable objector member. such as ,a boiler head, flue sheet, plate, or the like, the same having a tapered opening 1 previously formed therethrough in any suitablel'inam ner. In order to form a perfectly smooth sur; face upon the annular wall of the openingl, the same is preferably -rolled,to thereby remove any irregularities' in'lthe surface and to compact and harden theinaterialthereat;

My improved tool comprises a cage-2 of such cross-sectional si zeas to permit the same to be easily inserted. through the opening l in the member A, thisicage being provided with circ'umferentially spaced,:radial ly ex. tending apertures or slots?) through itsside wall, it being understood that these apertures are preferably spaced equidistantly about the circumference'of the cage so as to provide a uniform bearing and prevent wabbling of the tool after the rollers are in operation therein; 1 1

A tapered roller 4 is inserted into eachof the slots 3, said rollers being freely rotatable in "said slots'and movable outwardlythere through and beyond. the periphery of the cage, the longitudinal axes of these slots b'eingarranged at an angleto the longitudinal p axis of the cage so that the. longitudinal axes of the rollers, when in position, will beat an angle to the longitudinal axis ofthe.

cage and so that saidrollers will tend to have a self-feeding action forwardly throughthe opening 1 in the well-known manner.

A mandrel B,"having a reduced forward portion5 is insertable through a longitudi-T nal openingor bore 6 through said cagepsaid mandrel having a sharply'tapered portion 7 connecting said reduced endportion 5 with a more gradually tapered portion 8 rearwardly thereof. The rear portion of said mandrel is preferably threaded as at 9 for aJpurpose to be more clearly hereinafter described. This mandrel B is longitudinally;insertable and movablethrough the opening 6 of the cage so that the tapered portion 8 will a bear against andengage withthe rollers l to actuate the latter radially ouwardly into contact with the peripheral surface of the hole 1 as the mandrel ispushed forwardly through the cage. A collar 10 is removably securedto the forward end 5 of the mandrel so as to prevent the accidental separation of the cage and mandrela I An annular shoulder it provided from an integral cage member I which shall comprise the now separate parts 2 and 12. i

{The collapsible collar may be made in severalarcuatesections as, shown, the ends of said sectionsbeing circumferentially spaced apart when said collar is in laterally outermost position and. i adjacent one another when the segments"are-collapsed, A resilient band or spring 13 may be placed about the collariso as to retract thelsame to innermost or collapsed position when. the outwardly exertedpressure therea-gainst is removed.

In order to'limit' the expansion of the collar relative to the cage, have provided 'a'shoulder or fiangel t upon one of said members, as on thejcage, said flange being engageablewith an oppositely directed shoulder 15 upon the other of said members; p

'Itis to be particularly noted that the rollers extend forwardly a slight distance beneath the ,rear ends of the collar, or in other words, the rear portion of the collar surrounds and overhangs the forward porr tion. of the rollers. Therefore, any radial or lateral movement ofjthe rollers outwardly of the cage will necessarily actuate-the collar to'its expanded position, and the band L13 will' 'collapse the collar when the rollers are moved inwardlyi v In operation, the cage the retracted 7 ed through the opening 1, and then theman ,drel B is pushed forwardly through the cage,

rollers and collapsed collar thereonis insertuntil the portion 7 of'the mandrel passes the rollers, this action moving the 'rollers "radially outwardly. and causing the collar segments to be expanded andmoved to their outermost positionwhereupon. the same will engage against the .rearwall of the plate A. In'th1s position, theflaccidental withdrawal movement of the cage and rollers is prevented because the collar C forms a limitstop against the wall A. v v

a is preferably formed about theforward end of the cage 2 The mandrel is operable in any suitable manner by rotation of the same, together with forward rmoving or feeding, this movement causing the rollers 4 to perform their smoothing action against the. tapered surface of-the opening 1. An adjustable limit stop or edly engageable upon thethreads 9 of the mandrel and having a'keyed connection to thelatterasby the key 20. A look nut 21 is arranged upon the threaded end of the man- 'drel to engage against the rear end of the sleeve 16, also preventing the accidental displacement of the key 20. "The mandrel is fed forwardly and rotated until the forward face of the sleeve ltiengages againstthe rear face of the cageQ, and at which point the hole l will have been rolled to its-finished dimensions, v Invorder to back off ing, I have arranged another'sleeveQQ rotatably mountedupon the sleeve 16, with left hand threads 'therebetween. Therefore, a ro;

2, will'serve to force the forward face of the outersle-eve 22 against the rear face of the cage and retract the inner sleeve 16 andman drel connected thereto to withdraw the mandrel from the cage. Of. course, such with-'' drawal movement of the mandrel will permit the rollers to move radially inwardly toward their lowermost position,and at which time the resilient band 13 will move the collar C to collapsed position.

Having thus described obvious that various immaterial modifications may be made in'the same withoutdeparting from'the spirit of my invention;

hence I do not wish to be understood as limiting myself to the exact form, arrangement, construction and combination of parts herein shown-and described, except as limitedby the state of the art to which this invention appertains, and the. claims hereto appended.

' Having fully described"myf invention, 7 I

1. A tool for rolling an opening made through a member and comprising .a cage; rollers carried therein and movable outward ly 'therethrough amandrel movable through said cage to operably actuate said rollers outwardly; and a radially eXpansible collar adapted to engage said member to prevent;

I depth gauge .may be arranged at the rear end of themandrel, this stop comprising a'sl'eeve 16 threadas I the tool from the openmy invention it is V accidental withdrawal of said cage and operably actuated by said rollers. V

2. Atool for rolling the annularwall surface of an opening providedthrough 'a mem ber and comprising a cage insertable through said opening; rollers carried in this cage and movable radially therebeyond'; a mandrel movable through said cage to actuatesaid 96 .tative movement of theouter sleeve 22 relatively of the inner sleeve 16 after the latter is in abutment with therear end of the cageportion surrounding said rollers so that said collar is expanded outwardly by said rollers as the latter are similarly actuated.

y 4. A rolling tool of the kind described comprising a cage insertable through a hole provided in a member; rollers carried by said cage and movable laterallytherebeyond into rolling engagement with said hole; a tapered mandrel insertable through said cagejand actuating said rollers laterally outwardly" against said hole; and an expansible collar on said cage and engageable with said member to form a stop for preventing the ac cidental withdrawalof said cage from said opening, said collar surrounding a portion of said rollers that projects'longitudinally beyond said opening, so that said'collar is actuated into operative position by said rollers.

5. A tool of the kind described comprising a cage having lateral openings there through; tapered rollers in said openings,

- said cage with rollers and collar thereon being adapted to be insertedthrough a previ ously formed opening in a member; a radially separable collar on said cage beyond said rollers and adapted to be laterally actuated by said rollers, to form a limit stop to prevent said cage from backing out; and a tapered mandrel operably engageable with said rollers to force them outwardly against said opening. 7

6. A tool for rolling the annular wall surface of an opening provided through a member and comprising a cage; laterally movable rollers carried in this cage and insertable through said opening together with vsaid cage; a mandrel movable longitudinally through said cage to actuate said rollers outwardly; a radially collapsible collar operably controlled by the lateral movement'of said rollers, to form a limit stop against said member to prevent said tool from backing out of said opening; and means between said collar and cage to limit lateralmovement therebetween.

7 A hole finishing tool comprising a cage insertable through said hole; rollers movable laterally through said cage and carried thereby; a collapsible collar on said cage and overhanging a portion of saidrollers and extending therebeyond; means between said collar and cage to limit outward movement'of said collar; a tapered mandrel longitudinally ina sertable through said cage and engageable with said rollers to actuate them radially outwardly through said cage, said movement of the rollers actuating said collar to expanded I position to form a limit stop to prevent said tool from backing out of said hole; and means about said collar to actuate the latter to collapsed position when said rollers are moved to their radially innermost position.

8. A tool for rolling an opening made through a member, and comprising a cage insertable through said opening; rollers carried by said cage and engageable With the peripheral wall of said opening; and a collar carried by said cage and operably controlled by said rollers to prevent accidental withdrawal of said cage from said opening.

9. A tool for rolling an opening made through a member and comprising a roller carrier insertable "into said, opening; rollers carried by said carrier to engage the peripheral wall of said opening; and means controlled by the radial movement of said rollers to engage against said member to prevent withdrawal of said carrier when said rollers are in operative engagement with said open- 1ng.,

In testimony whereof I have aflixed my signature.

' GRAVES R. MAUPIN, 

